For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2

All typical values are at V

CC

= 5V, T

amb

= 25

°

C.

Philips Semiconductors

Product specification

74F38

Quad 2-input NAND buffer (open collector)

October 4, 1990

4

AC ELECTRICAL CHARACTERISTICS

LIMITS

TEST

V

CC

= +5.0V

V

CC

= +5.0V

±

10%

V

CC

= +5.0V

±

10%

SYMBOL

PARAMETER

TEST

CONDITION

T

amb

= +25

°

C

T

amb

= 0

°

C to +70

°

C

T

amb

= ­40

°

C to +85

°

C

UNIT

CONDITION

C

L

= 50pF, R

L

= 500

C

L

= 50pF, R

L

= 500

C

L

= 50pF, R

L

= 500

MIN

TYP

MAX

MIN

MAX

MIN

MAX

t

PLH

t

PHL

Propagation delayDna, Dnb to Qn

Waveform 1

7.51.5

10.0

3.0

12.5

5.0

7.51.5

13.0

5.5

7.51.5

14.5

6.0

ns

AC WAVEFORMS

VM

VM

VM

VM

Qn

Dna, Dnb

tPHL

tPLH

SF00005

Waveform 1.

Propagation delay for inverting outputs

NOTE:For all waveforms, V

M

= 1.5V.

TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS

0

2

4

6

8

10

12

14

16

18

0

100

200

300

400

500

600

t

PHL

t

PLH

Load resistor

(

)

Propagation delay (ns)

SF00044

NOTE:1

When using open collector parts, the value of the pull-up resistor greatly affects the value of the t

PLH

. For example, changing the specified

pull-up resistor value from 500

to 100

will improve the t

PLH

up to 50% with only a slight increase in the t

PHL

. However, if the value of the

pull-up resistor is changed, the user must make certain that the total I

OL

current through the resistor and the total I

IL

's of the receivers does

not exceed the I

OL

minimum specification.

Philips Semiconductors

Product specification

74F38

Quad 2-input NAND buffer (open collector)

October 4, 1990

5

TEST CIRCUIT AND WAVEFORM

tw

90%

VM

10%

90%

VM

10%

90%

VM

10%

90%

VM

10%

NEGATIVEPULSE

POSITIVEPULSE

tw

AMP (V)

0V

0V

tTHL (tf

)

INPUT PULSE REQUIREMENTS

rep. rate

t

w

t

TLH

t

THL

1MHz

500ns

2.5ns

2.5ns

Input Pulse Definition

VCC

family

74F

D.U.T.

PULSE

GENERATOR

RL

CL

RT

VIN

VOUT

Test Circuit for Open Collector Outputs

DEFINITIONS:R

L

= Load resistor;

see AC electrical characteristics for value.

C

L

= Load capacitance includes jig and probe capacitance;

see AC electrical characteristics for value.

R

T

= Termination resistance should be equal to Z

OUT

of

pulse generators.

tTHL (tf

)

tTLH (tr

)

tTLH (tr

)

AMP (V)

amplitude

3.0V

1.5V

V

M

RL

7.0V

SF00027

Philips Semiconductors

Product specification

74F38

Quad 2-input NAND buffer (open collector)

1990 Oct 04

6

DIP14:

plastic dual in-line package; 14 leads (300 mil)

SOT27-1

Philips Semiconductors

Product specification

74F38

Quad 2-input NAND buffer (open collector)

1990 Oct 04

7

SO14:

plastic small outline package; 14 leads; body width 3.9 mm

SOT108-1

Philips Semiconductors

Product specification

74F38

Quad 2-input NAND buffer (open collector)

yyyy mmm dd

8

Definitions

Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. Fordetailed information see the relevant data sheet or data handbook.

Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above oneor more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these orat any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extendedperiods may affect device reliability.

Application information -- Applications that are described herein for any of these products are for illustrative purposes only. PhilipsSemiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing ormodification.

Disclaimers

Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products canreasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applicationsdo so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standardcells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes noresponsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to theseproducts, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unlessotherwise specified.

This data sheet contains the design target or goal specifications for product development.Specification may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date.Philips Semiconductors reserves the right to make chages at any time without notice in order toimprove design and supply the best possible product.

This data sheet contains final specifications. Philips Semiconductors reserves the right to makechanges at any time without notice in order to improve design and supply the best possible product.

Data sheet status

[1]

Please consult the most recently issued datasheet before initiating or completing a design.